Tuesday 9 July 2013

Electrochemical Cells

Electrochemical cells involve two half-cells: one where oxidation occurs and one where reduction occurs. When connected and placed in a circuit, these chemical reactions generate an electric potential (voltage) and a current.



Electrolysis

Electrolysis is a process by which electrical energy is used to convert compounds into their elements.


Friday 5 July 2013

More amazing science.

Scientists are on a roll this year. 
First they created the perfectly optimised bit, then were able to observe an electron cloud and now this.

Thursday 4 July 2013

Reactions of Potassium Permanganate

The reduction of KMnO4 is different under acidic, alkaline and neutral conditions:


Here is a wonderful summary of the reactions of KMnO4: